electronic projects, tutorials, hardware hacking…

Tag Archive: project

Since I’m receiving at least a couple of questions each day about my tutorial video on Converting Computer ATX Power Supply to Lab Bench Power Supply and I can’t answer them all, I thought it’s time to answer to the most frequently asked questions. If you think that I forgot to highlight some important question(s), …

On my desktop PC I have a speakers and a headphones. Usually I use headphones, but when I need to switch to speakers I need to physically plug in speakers instead of headphones to my PC’s soundcard. I wanted to solve this problem for a long time, but never get around of that until recently …

First fully working revision of firmware is finished, which takes all 2k of ATtiny2313′s memory. I wrote it in C, and I wanted to implement some other functionality, but unfortunately I’m out of space(of course if I would want to, I can put there ATtiny4313, which is identical to ATtiny2313, but has 4k of memory). …

Very often when designing some stuff I need a square wave signal generator with variable pulse width and frequency to control power MOSFETS. You can use such a tool when designing DC-DC converter or switch-mode power supply, you can use it to emulate PWM from microcontroller when developing some new embedded design, or maybe you …

ATtiny2313 – Based thermostat project update. I wrote a small test firmware for it to test if everything is wired up the right way and to test it’s current consumption. And it turns out that there were some mistakes.. Also it’s current consumption is well below 150mA that I was expecting.

So I’ve came back to my ATtiny2313 – based thermostat project, that I’ve started to work on some time ago. And today I have assembled a first prototype (actually I only need a couple of these). If you haven’t seen video I’ve made on this project, you can watch it here: Part1 Video. It’s based …

In this followup video I’ll show some problems that I encountered with my power supply from the previous tutorial video and will show you how I fixed those. It shows that even with the simplest project where “nothing can go wrong” you can’t predict every problem that could happen.

How to build your own linear adjustable power supply based on LM317. In this tutorial I’ll explain how linear power supply works, what parts it consists of and a lot of small details, like how to calculate smoothing capacitor value, or how to choose a transformer. Plus you’ll see how to build an actual power …

I’ve got a new tool on my workbench – portable fume extractor. It’s 92mm fan that works from 4 AA batteries and has a variable speed. Mobility is a really good thing, especially when you’ve got a tons of equipment and cables on a bench you can drown in.